Abstract
The measurement of the grasping space formed by hand have been measured. The grasping space of mother finger and index finger inclined from 15 by 20 degrees, three grasing spaces of the palm -middle finger, the palm -ringe finger , and the palm -little finger were almost constant. Moreover, the holding diameter can be approximated as the first approximation in the oval. In addition, as aproximated as a clinder, the obtained grasping space diameter neraly same as optimal grasping diameter evaluated sensory test.
